flint-sys 0.9.0

Bindings to the FLINT C library
Documentation 
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/*
    Copyright (C) 2012 Fredrik Johansson

    This file is part of FLINT.

    FLINT is free software: you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License (LGPL) as published
    by the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.  See <https://www.gnu.org/licenses/>.
*/

#include "test_helpers.h"
#include "arb.h"

TEST_FUNCTION_START(arb_log_ui_from_prev, state)
{
    slong iter;

    for (iter = 0; iter < 10000 * 0.1 * flint_test_multiplier(); iter++)
    {
        arb_t z1, z2, z3;
        ulong n1, n2;
        slong prec, accuracy;

        prec = 2 + n_randint(state, 3000);
        n1 = n_randint(state, 100000);
        n2 = n1 + 1 + n_randint(state, 1000);

        arb_init(z1);
        arb_init(z2);
        arb_init(z3);

        arb_log_ui(z1, n1, prec);
        arb_log_ui(z2, n2, prec);

        arb_log_ui_from_prev(z3, n2, z1, n1, prec);

        if (!arb_overlaps(z2, z3))
        {
            flint_printf("FAIL: overlap\n\n");
            flint_printf("prec = %wd, n1 = %wu, n2 = %wu\n\n", prec, n1, n2);
            flint_printf("z1 = "); arb_printd(z1, prec / 3.33); flint_printf("\n\n");
            flint_printf("z2 = "); arb_printd(z2, prec / 3.33); flint_printf("\n\n");
            flint_printf("z3 = "); arb_printd(z3, prec / 3.33); flint_printf("\n\n");
            flint_abort();
        }

        accuracy = arb_rel_accuracy_bits(z3);

        if (accuracy < prec - 4)
        {
            flint_printf("FAIL: accuracy = %wd, prec = %wd\n\n", accuracy, prec);
            flint_printf("n1 = %wu, n2 = %wu\n\n", n1, n2);
            flint_printf("z3 = "); arb_printd(z3, prec / 3.33); flint_printf("\n\n");
            flint_abort();
        }

        arb_clear(z1);
        arb_clear(z2);
        arb_clear(z3);
    }

    TEST_FUNCTION_END(state);
}